Abstract The technique of laser absorption spectroscopy is widely used in the study atomic structure. In order to thoroughly analyze recorded structure complex atoms, effect saturation must be taken into account. current paper we present a method analysis Zeeman and hyperfine structures spectra obtained with use spectroscopy, which allows take account saturation. Graphic abstract

The preci e measurement of infrared absorp tion spectra has been accomplish ed by using the " "hi telight frin ges of a Fabry-Perot interferometer in conjunctie n with atomic spcctrall in es. \\Tayelengths from the first spectra of neon, argon, krypton, a nd xenon were uscd for calibrating t he fringcs. The absorption spectra and the fringe systcm are recorded simultaneously by a two-pen r ecor...

The origin of the soft excess seen in many AGN below ∼1 keV is still an unsolved problem. It is unlikely to represent a true continuum component as its characteristic ‘temperature’ shows a remarkable constancy over a wide range of AGN luminosity and black hole mass. This instead favours an association with atomic processes, in particular with the increase in opacity between 0.7–2 keV associated...

We present extensive calculations of radiative transition rates and electron impact collision strengths for Fe II. The data sets involve 52 levels from the 3d, 3d4s, and d s 3 4 5 2 configurations. Computations of A-values are carried out with a combination of state-of-the-art multiconfiguration approaches, namely the relativistic Hartree–Fock, Thomas–Fermi–Dirac potential, and Dirac–Fock metho...

Although clusters have attracted great interest as intermediate states between atomic and condensed states of matter [1], general methods for the size-selective structural analysis of neutral clusters have not been established so far. Recently we measured the Pho toe lec t ron Pho to ion Coincidence (PEPICO) spectra for selenium dimer Se2 and larger species such as Se5 [2,3]. The PEPICO spectra...

We measured the synchrotron-radiation (SR)-based Mössbauer spectra of Ni-based nanoparticles with a hexagonal structure that were synthesised by chemical reduction. To obtain Mössbauer spectra of the nanoparticles without (61)Ni enrichment, we developed a measurement system for (61)Ni SR-based Mössbauer absorption spectroscopy without X-ray windows between the (61)Ni84V16 standard energy alloy ...

In this study, Mn (III) salen complex was synthesized and immobilized onto the graphene oxide, which is modified by 3-chloropropyltrimethoxy silane. Heterogeneous catalyst was characterized by X-ray diffraction, transmission electron microscopy, thermogravimetric analysis, fourier transform infrared spectra, nitrogen adsorption−desorption isotherm and atomic absorption spectroscopy. The catalyt...

Toward Quantitative Calculation and Analysis of X-Ray Absorption Near Edge Spectra Joshua Kas Chair of the Supervisory Committee: Professor John Rehr Physics X-ray absorption spectroscopy (XAS) has been used extensively to determine local electronic and structural properties. While quantitative analysis of extended x-ray absorption fine structure (EXAFS) has been available for over two decades,...

Background: The aim of the present study was application of haemoglobin absorption spectroscopy as a distinguishing tool for identification of two haemoglobin types-HbA and HbS. Material and Methods: Millimolar absorptivities of normal adult haemoglobin (HbA) and sickle cell haemoglobin (HbS) were monitored at pH values of 7.2 and 5.0, within the ultra violet and visible spectral range (250-...

In this study, four arylazobenzylidene dyes (a-d) were synthesized with excellent yields in two steps using Knoevenagel condensation and azo-coupling reactions. Absorption spectra of these dyes with different substituents were investigated in organic solvents as a function of solvent polarity. The spectral features of synthesized arylazobenzylidene dyes were described according to azo-hydrazone...